Amortization Calculator Extra Payments Auto Loan
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Reviewed by Calculator Editorial Team
This amortization calculator helps you understand how extra payments on your auto loan affect your loan term and total interest paid. By making additional payments, you can pay off your loan faster and save on interest costs.
How the Amortization Calculator Works
An amortization schedule shows how your loan balance changes over time with regular payments. When you make extra payments, the calculator adjusts the schedule to reflect the reduced interest and faster payoff.
Monthly Payment Formula
P = L × (r(1 + r)^n) / ((1 + r)^n - 1)
Where:
- P = Monthly payment
- L = Loan amount
- r = Monthly interest rate (APR/12)
- n = Number of payments (loan term in months)
The calculator uses this formula to determine your regular monthly payment. When you add extra payments, it recalculates the schedule to show how your loan balance decreases faster.
How to Use the Calculator
- Enter your loan amount in the "Loan Amount" field.
- Input your annual percentage rate (APR) in the "Interest Rate" field.
- Specify the loan term in years in the "Loan Term" field.
- Enter any extra payments you plan to make in the "Extra Payments" field.
- Click "Calculate" to see your amortization schedule and results.
Note
The calculator assumes you make extra payments at the same time as your regular payments. The results show how your loan balance changes with these extra payments.
Example Calculation
Let's say you have a $20,000 auto loan with a 5% APR and a 4-year term. If you make $200 extra payments each year, the calculator will show:
| Year | Regular Payment | Extra Payment | Total Payment | Interest Paid | Principal Paid | Remaining Balance |
|---|---|---|---|---|---|---|
| 1 | $432.88 | $200.00 | $632.88 | $187.50 | $445.38 | $19,554.62 |
| 2 | $432.88 | $200.00 | $632.88 | $175.00 | $457.88 | $19,096.74 |
| 3 | $432.88 | $200.00 | $632.88 | $162.50 | $460.38 | $18,636.36 |
| 4 | $432.88 | $200.00 | $632.88 | $150.00 | $482.88 | $18,153.48 |
With these extra payments, you'll pay off your loan 1 year early and save $1,000 in interest compared to making only regular payments.
Frequently Asked Questions
How do extra payments affect my loan term?
Extra payments reduce your loan balance faster, which means you'll pay off your loan sooner. The calculator shows exactly how many months you'll save by making extra payments.
Will making extra payments increase my monthly payment?
No, the regular monthly payment stays the same. Extra payments are additional amounts you pay on top of your regular payment each month.
Can I make extra payments at any time?
Most lenders allow extra payments, but check your loan agreement. The calculator assumes you make extra payments at the same time as your regular payments.
How much can I save with extra payments?
The savings depend on how much you pay extra and how long you make those payments. The calculator shows the exact interest savings from your extra payments.